Colonization and Performance of Diazotroph Endophytic Bacteria on Palm Oil (<i>Elaeis guineensis</i>Jacq L.) Leaves

Aryantha, I Nyoman Pugeg; Hidiyah, A.R.M

doi:10.1088/1755-1315/166/1/012012

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…In turn, Stenotrophomon asmaltophila and Herbispirillum rubrisubalbicans had been noted earlier as plant pathogens, but they showed high potential for N fixation and the production of auxins [40,45]. Aryantha and Hidiyah [56] determined the colonization of diazotroph endophytic bacteria on oil palm leaves (Elaeis guineensis Jacq L.) and found that Bacillus cereus displayed the highest nitrogen fixation capability. The ability of N fixation was also confirmed in the case of Exiguobacterium profundum strain N4 colonizing Amaranthus spinosus [57], Rhizobium, Sphingomonas, Azospirillum, and Grobacterium inhabiting wild rye tissues [58].…”

Section: Biosynthesis Of Factors Stimulating Plant Growthmentioning

confidence: 99%

Agricultural and Other Biotechnological Applications Resulting from Trophic Plant-Endophyte Interactions

2019

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Endophytic microbiota plays a role not only in supplying plants with the basic nutrients indispensable for their growth, but also helps them in the mechanisms of adaptation to various environmental stresses (i.e., salinity, drought), which is important in the aspect of crop yields. From the agricultural and biotechnological points of view, the knowledge of endophytes and their roles in increasing crop yields, plant resistance to diseases, and helping to survive environmental stress is extremely desirable. This paper reviews some of the beneficial plant–microbe interactions that might be potentially used in both agriculture (plant growth stimulation effect, adaptation of host organisms in salinity and drought conditions, and support of defense mechanisms in plants), and in biotechnology (bioactive metabolites, application of endophytes for bioremediation and biotransformation processes, and production of biofertilizers and biopreparations). Importantly, relatively recent reports on endophytes from the last 10 years are summarized in this paper.

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Section: Biosynthesis Of Factors Stimulating Plant Growthmentioning

confidence: 99%

Agricultural and Other Biotechnological Applications Resulting from Trophic Plant-Endophyte Interactions

2019

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“…A positive reaction in nitrogen-fixing is indicated by a color change from green to blue color and a ring/pellicle is formed on semi-solid NfB media. The color change of media is caused by organic acid, which is secreted by bacteria capable of living on nitrogen-free media (Aryantha and Hidiyah 2018). The color change indicated the nitrogenase activity of nitrogen-fixing bacteria.…”

Section: Discussionmentioning

confidence: 99%

“…The color change occurs because the bromothymol blue indicator on the media turns blue at alkaline pH. The formation of a pellicle is an indicator that bacteria can reduce the source of N from the media as a nitrogenase activity (Aryantha and Hidiyah 2018).…”

Section: Nitrogen Fixation Assaymentioning

confidence: 99%

Screening and characterization of endophytic bacteria isolated from celery with the potential to promote plant growth

NURIYANAH,

WIDOWATI,

MASNANG

et al. 2024

Biodiversitas

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Abstract. Nuriyanah, Widowati T, Masnang A, Nurjanah L, Novilasari D, Lekatompessy SJR, Simarmata R. 2023. Screening and characterization of endophytic bacteria isolated from celery with the potential to promote plant growth. Biodiversitas 24: 6897-6904. Endophytic bacteria that inhabit plant tissue contribute to the enhancement of host plant growth by producing secondary metabolites. They can improve plant growth by phytohormone modulation and nutrient uptake. In addition, endophytic bacteria can increase plant health and tolerance by antibiotic and hydrolytic enzyme production. This study aims to screen and characterize endophytic bacteria of celery as plant growth promoter agents. Thirty endophytic bacteria were isolated successfully from part of the celery plant using the spread plate and plant piece method which grew at Nutrient Agar media. Based on the characterization assay, 30 isolates may produce IAA with various concentrations of 0.21-7.18 mg/L. In addition, 3 of 30 isolates had phosphate solubilizing activity, in different indexes ranging from 0.71-1.43. Twenty-one isolates were able to grow in an N-free medium, indicating the capability of isolates to fix nitrogen qualitatively. The hydrolytic enzymes assay resulted in 14 amylolytic, 17 proteolytic, and 12 cellulolytic activities. In addition, nine of 30 isolates show multi-activity in amylase, protease, and cellulase enzyme production. Based on the screening results, there are four potential isolates (SLBg 1.2; SLBg 1.5; SLAg 1.1, and SLAg 1.5) as promising plant-growth promoters and were molecularly identified as members of the Bacillus genus. These isolates can be developed as biofertilizers for supporting the cultivation of celery plants.

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“…Ammonia production was assayed with Nessler reagent and development of slight yellow to brownish color was considered to be a positive test for ammonia production [ 91 ], which production was categorized on the basis of color intensity. Phosphate solubilization was assayed on plates with Pikovskaya’s agar medium and the formation of zone of clearance around the colonies indicated the positive solubilization ability and solubilization potency was measured based on Phosphate Solubilization Index (PSI) as Total diameter of halo zone/Colony diameter [ 92 , 93 ]. Siderophore release was determined with Chrome Azurol S (CAS) agar medium.…”

Section: Methodsmentioning

confidence: 99%

Potential of Rhizobia Nodulating Anthyllis vulneraria L. from Ultramafic Soil as Plant Growth Promoting Bacteria Alleviating Nickel Stress in Arabidopsis thaliana L.

Sujkowska-Rybkowska

Rusaczonek

Kasowska

et al. 2022

IJMS

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Rhizobia, which enter into symbiosis with legumes, can also interact with non-legumes and promote plant growth. In this paper, we explored the effects of nickel (Ni, 200 µM) on Arabidopsis thaliana (Col-0) inoculated with plant growth-promoting (PGP) rhizobia nodulating ultramafic Anthyllis vulneraria. The isolated PGP strains tolerant to Ni were identified as Rhizobium sp. and Bradyrhizobium sp. The isolates highly differed in their PGP abilities and Ni resistance. Without Ni-stress, the plants inoculated with most isolates grew better and had higher photosynthetic efficiency than non-inoculated controls. Nickel treatment increased Ni concentration in inoculated plants. Plant growth, leaf anatomy, chloroplast ultrastructure, efficiency of photosynthesis, and antioxidant defense system activity were significantly impaired by Ni, however, the majority of these effects were diminished in plants inoculated with the most effective PGP rhizobia. Real-time PCR revealed an increased expression level of genes involved in auxin and gibberellin biosynthesis in the inoculated, Ni-treated plants, and this may have improved shoot and root growth after inoculation with effective isolates. Our results also suggest a positive correlation between Ni-stress parameters and antioxidant defense system activity, and also between the effectiveness of photosynthesis and plant growth parameters. We showed that the selected rhizobia, naturally nodulating Anthyllis on Ni-rich ultramafic soils can promote Arabidopsis growth and increase plant tolerance to Ni by improving different physiological and biochemical mechanisms.

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Colonization and Performance of Diazotroph Endophytic Bacteria on Palm Oil (Elaeis guineensisJacq L.) Leaves

Cited by 5 publications

References 17 publications

Agricultural and Other Biotechnological Applications Resulting from Trophic Plant-Endophyte Interactions

Agricultural and Other Biotechnological Applications Resulting from Trophic Plant-Endophyte Interactions

Screening and characterization of endophytic bacteria isolated from celery with the potential to promote plant growth

Potential of Rhizobia Nodulating Anthyllis vulneraria L. from Ultramafic Soil as Plant Growth Promoting Bacteria Alleviating Nickel Stress in Arabidopsis thaliana L.

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